Timer



April 19, 1927.

I'll-Ill v. HVMATHES TIMER Filed Nov. 1;. 1925 Patented Apr. 19, 1927.

UNITED STATES VIBGIL H. MATHES, 0F INDIANAPOLIS, INDIANA.

TIMER.

Application filed November 13, 1925. Serial No. 68,892.

My said invention relates to improvements in timers or distributors forignition systems of internal combustion engines and it is an object ofthe invention to provide a device of this character in which springs arepractically eliminated and Which is simpler in construction, morepositive in action, and which can be produced at a very slight cost. I

Another object of the invention is to provide an improved distributerhead having practically no metal parts therein other than those whichform the contacts thereby precluding accidental short circuitinReferring to the accompanying drawings which are made a part hereof andon which similar reference characters indicate similar parts,

liigure 1 is a side elevation of a front end of an internal combustionengine showing my device attached thereto,

Figure 2, a front elevation,

Figure 3, an enlarged longitudinal section view, 1

Figure 4:, a top plan view with the cover and some of the parts removed,and

Figure 5, a similar view with additional part-s removed.

As shown in the drawings my invention comprises a casing for attachmentto the cam shaft 11 of an engine of the Ford or similar type. Theperipheral wall of the casing 10 is provided with a plurality oflongitudinally spaced openings 12 about which are mounted a plurality'ofsleeves 13 arranged in substantially parallel relation and substantiallyat right angles to the casing 10. The upper ends of the sleeves 13 aresecured to a plate 14k which is fastened by screws or the like to theunder side of a housing 15 formed of material of good insulationproperties.

The housing 15 has a slot 16 in its bottom through which extend theupper ends of push rods 17 located in the sleeves 13 and adapted toreciprocate therein. Said housing is also provided with a contact 19 foreach of the push rods and these contacts are located one in each of thefour corners of the housing at the bottom of vertically arranged groovesor recesses and are engaged by lateral extension 18 on the push rods 17.The contacts 19 are formed of flattened metallic strips and are held inplace by threaded connections with bolts extending through the bottom ofthe housing. The threaded bolts extend through the contacts 19 andprovide mountings for the terminals 20 which extend slightly above thetop of the housing 15. Said terminals may be provided with sockets forthe reception oi? conductors not shown.

The lateral extensions of the push rods terminate short of the terminals20 but are limited in their lateral movement by the sides of thevertically disposed recesses or grooves; On account of this constructionit will be impossible for the lateral portions on the push rods toaccidentally move out of position where they will not seat upon theircooperative contacts when the push rods are raised and lowered duringthe operation of the engine. I i

In order to make and breahthe connection at the proper intervals Iprovide a cam 21 and fasten the same to the camshaft, said cam has aflat face or depression for each push rod so thaothe revolution oi thecam will keep the push rod raised and the extension 18 oil the contact19 for the greater portion of the revolution but permit the same to belowered and the contact to be completed.

In order to maintain the push rods and the lateral extensions at theupper ends thereof in engagement with their respective contacts aplurality of rubber disks are threaded upon a core to form a rubbercylinder, one of which is positioned on each lateral extension on theupper end of the push rod for holding the same against correspondingcontact. A block 23 is placed centraily across the housing formaintaining the rubber cylinders over their respective contacts.

A. cover 2 1 is provided for the housing 15 and this cover is held inplace by screws and in turn compresses the rubber cylinders againsttheir respective laterally extending contact elements.

It will be obvious to those skilled in the are that various changes maybe made in my device without departing from the spirit of the inventionand therefore I do not limit myself to what is shown in the drawings anddescribed in the specification but only as indicated in the appendedclaims:

Having thus fully described my said invention, what I claim as new anddesire to secure by Letters Patent, is:

1. In a timer for engines, the combination of a casing, a cam withinsaid casing, a

housing in spaced relation to said casing, contacts in said housing, aplurality of sleeves connecting said housing and casing, and push rodsdisposed in said sleeves and having laterall extending upper ends overlying" said contacts and adapted for engagement therewith, substantiallyas setforth.

2. A timer comprising a casing, a housing, s'eeves connecting saidcasing and housing. contacts within said housing", was disposed in saidsleeves said rods having their upper ends proided with lateralextensions overl iing said contacts, spring means for holdsaid lateralextensions in engagementin with said contacts. and a cam in said casingfor oierating said push rods, substantially as set forth.

3. A tiiner comprising a casing, a houring, sleeves connecting saidcasing; and housing, contacts Within said housing. rods disposed in saids eeves said rods having their upper ends provided With lateralextensions overlying said contacts, insulated springs resting on saidlateral extensions, and a cover for said housing holding said insulatedsprings against said lateral extension, substantially as set forth.

4. A timer comprising a casing, a housing, sleeves connecting saidcasing and housing, contacts Within said housing, rods disposed'in saidsleeves said rods having their upper ends proivded with lateralertensions overlying said contacts, spring means formed of insulatingmaterial resting on said lateral extensions, and a e ver for saidhousing holding said insulating spring means against said lateralextensions said housing having spaced recesses for maintaining thelateral extensions and their associated contacts from lateralseparation, substantially as set forth.

In witness whereof, I have hereunto set my hand at Indianapolis, Indianathis 10th day of November, A. D. nineteen hundred and twenty-five.

VIRGIL H. MATHES.

